所以我已经建立了一个基本的网络音频鼓机，但我想通过使用持续时间超过1.5秒的if mousedown功能控制每个打击垫的音量，然后控制滑块并且不要触发打击垫
<div id="sectionSequencer">
<table>
<tr>
<td><button class="pads" id="Kick">Kick<input type="range" min="0" max="1" step="0.01" value="1" class="padgain" /></button></td>
var indgain = [];
indgain["Kick"] = 0.25;
和函数的jquery
$('#padgain').on("change mousemove", function() {
indgain[selectedPad] = $(this).val();
});
// Event handler for any button with "sample" class
$(".pads").button().mousedown(function(event){
if (mousedown >= 1500) {
selectedPad = this.id;
var gainpad = audioCtx.createGain();
padgain.gain.value = indgain [this.id];
gainpad.connect(gainMaster);
}
else if (mousedown < 1500){
playSound;
}
selectedPad = this.id;
// Create an AudioBufferSourceNode
var playSound = audioCtx.createBufferSource();
var biquadFilter = audioCtx.createBiquadFilter();
biquadFilter.type = "lowpass";
biquadFilter.Q.value = 1;
biquadFilter.frequency.value = padCutoffs[this.id];
playSound.connect(biquadFilter);
var myDelay = audioCtx.createDelay(0.25);
myDelay.delayTime.value = paddelay[this.id];
biquadFilter.connect(myDelay);
var gainMaster = audioCtx.createGain();
gainMaster.gain.value = 5;
myDelay.connect(gainMaster);
// Note: the Web Audio spec is moving from constants to strings. // filter.type = 'lowpass';
// this.id has the key for the buffer in the array we wish to use
// (retrieved from the button that was clicked)
// Go ahead and assign this buffer to the AudioBufferSourceNode
playSound.buffer = samples[this.id]
// Connect the AudioBufferSourceNode to the context's output
// playSound.connect(audioCtx.destination);
// Queue the AudioBufferSourceNode up for playback immediately
// playSound.start();
//playSound.connect(audioCtx.destination);
playSound.start();
gainMaster.connect(audioCtx.destination);